Fragment of a Platyceras dumosum

This fossil fragment is of a Platyceras dumosum (Conrad, 1840) spiny snail (gastropod). It was found in Clark County, Indiana USA.  The layer it was found is called the Jeffersonville Limestone which dates to the Middle Devonian Period. My nephews Joseph and Jack found this while we were out collecting.

 

Culmicrinus elegans Crinoid Fossil

 

This fossil appears to be a Culmicrinus elegans (Wachsmuth & Springer, 1897) crinoid calyx. It was found in the Chester Group of Glen Dean Formation in southern Indiana USA. The fossil dates to the Mississippian Period. The fossil is about 9 cm tall.

Coiled Crinoid Stem Fossil

 

These pictures are of a coiled crinoid fossil. It was found in the Waldron Shale of Clark County Indiana USA. The fossil dates to the Silurian Period.